.box1 {
  width: 400px;
  height: 200px;
  background-color: #6ced68;
}
.box2 {
  width: 50px;
  height: 76.92307692px;
  background-color: red;
}
.box3 {
  width: 100px;
  height: 100px;
  background-color: #6ced68;
}
